let chartDataStr = decodeHtml(chartData);
let chartJsonArray = JSON.parse(chartDataStr);

let arrayLength = chartJsonArray.length;
let numericData = [];
let labelData = [];

for (let i = 0; i<arrayLength; i++){
    numericData[i] = chartJsonArray[i].value;
    labelData[i] = chartJsonArray[i].label;
}


//饼图
const data = {
    labels:labelData,
    datasets: [{
        label: 'My First Dataset',
        data: numericData,
        backgroundColor: [
            'rgb(255, 99, 132)',
            'rgb(54, 162, 235)',
            'rgb(255, 205, 86)'
        ],
        hoverOffset: 4
    }]
};
//配置选项
const options ={
    plugins:{
        title:{
       display: true,
        text: '项目状态'
    }
}
}

new Chart(document.getElementById("myPieChart"),{
    type:'pie',
    data:data,
    option:options
})
//[{"value":1,"label":"未开始"},{"value":2,"label":"进行中"},{"value":1,"label":"已完成"}]
function decodeHtml(html){
    let txt = document.createElement("textarea");
    txt.innerHTML = html;
    return txt.value;
}